Magnetic separator.



N0. 842,583. v PATENTED JAN. 29,l 1907.

G. J. REED. MAGNETIC SEYPARATOR. APPLIOATION HLBDAUG. 15, 1902.

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C. J. REED. MAGNETIC SEPARATDR.

APPLIOATION FILED AUG. 15, 1902.

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UNITED STATES PATENT OFFICE.

No. 842,583.v

Specification of Letters Patent.

Patented Jan. 29, 1907.

Application filed August l5, 1902. Serial Nol 119,763.

T0 aff/Z who/1t t may concern:

Beit known that I, CHARLES J. REED, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented a new and useful Improvement in MagneticSeparators, of which the following is a specification.

My invention relates to apparatus employed for separating magnetizablefrom non-magnetizable granular or comminuted material; and it has forits object to provide apparatus of this character which shall be simpleand comparatively inexpensive in construction and which shall operate toeffect the separation of concentrates from the comminuted ore .moreeffectively and rapidly than can be done by the apparatus usuallyemployed for this purpose.

Except as regards certain essential features of my invention theconstruction of the apparatus employed may be varied within wide limitsg but I have devised apparatus which I have found satisfactory andeffective in operation, and this I have illustrated in the accompanyingdrawings, in which- Figure 1 is a view mainly in side elevation, butpartially in section, of such apparatus. Fig. 2 is a view lookingdownward at right angles to the plane of the frame of the apparatus asshown in Fig. 1. Fig. 3 is a detail view of the device for effectingvibration of the ore-chutes. Fig. 4 is a longitudinal sectionalview ofone of the magnet-coils, its core, and the parts immediatelyv connectedto and Fig. 5 is a plan view of one of the separator-disks and thecorresponding field-magnet pole-piece, the shaft for rotating the diskand the core of the magnet being shown in section. Fig. 6 is a viewsimilar to Fig. 5, but showing a pole-piece of modified form.

As shown in the drawings, the separatormagnet comprises two coils 1, twocorresponding cylindrical cores 2, a yoke 3', connecting the upper endsof the cores, and a pole-piece 4 for the other end of each of the cores.

As shown in Figs. 4 and 5, each pole-piece 4 comprises a collar 5, whichfits over the core 2 and is fastened thereto by means of a set-screw 6or .other suitable means, and a piece 7, that projects outwardly anddownwardly toward both sides of the apparatus. The endS of thepole-piece projects a greater distance than the other end and ispreferably curved, as indicated, the curvature being eccentric to thecore, for a purpose to be hereinafter more fully described.

Projecting through each cylindrical core bearings is a shaft 9, theupper end of which is provided with a pulley 10 and to the lower end ofwhich is suitably fastened a sleeve 11, from which project inclined armsor wings 12, to the lower ends of which is fastened an annular disk 13of non-magnetic material. The arms 12, sleeve 11, and disk 13 mayobviously be integral parts of a single structure, if desired. Thesleeve 11 may beadjusted longitudinally on the shaft 9, but will begenerally in such position that the top facev of disk 13 will be inclose proximity to the lower face of the pole-piece 4.

The frame 14, in which the parts already described are mounted, is builtup mainly of longitudinal land transverse timbers, properly boltedtogether, and since such framework may be variously constructed asregards the number and location of its parts a specific description ofthe details of this porsary.

The upper or main portion 15 of the framework is normally located at aconsiderable angle to the horizontal. As shown in the drawings, thisangle is approximately thirty degrees; but in order that it may bevaried to suit the desires of the user or any other conditions that mayobtain I have provided an adjusting means comprising a bar 16, hinged atits upper end to the frame at 1.7 and having in its lower end a nut 18,with which engages a screw-rod 19, a longitudinal recess being providedin the bar 16 to receive this screw-rod. The lower end of the screw-rodis provided with a head 20, having holes for the insertion of a bar vinorder to turn it to effect the adjustment desired, and this head isprovided with a rounded projection 21 on its lower side, which may restupon any suitable support, a block 22, provided with a suitable recessat the top, being shown in the drawings.

The front of the frame may rest upon any suitable support on the groundor the iioor of the building in which the apparatus is located, or itmay be suspended from overhead floor joists or beams or roof beams ortrusses by means of a suitable suspension device 23, as indicated in thedrawings.

In order to feed the comminuted ore to the and journaled and supportedin suitable tion of the apparatus is regarded as unneces- A IOOapparatus for the separation of the magnetic particles therefrom, Iprovide one or more chutes 24, two being shown in the drawings, one endof each being supported upon a beam 25, which is in turn supported bytimbers 26, that proj ect downwardly from the upper por-Y tion 15 of theframework. Each chute is preferably pivotally supported upon the beam25, so that it may vibrate laterally upon this support, and its frontend is supported by means of adjustable hangerrods 27.

The end of each chute which is supported upon the beam 25 may beprovided with a suitable hopper 28, having an opening 29 at its frontend, preferably extending the width of the chute, and the material maybe shoveled into this hopper or may be suppliedl thereto by any suitablemechanically-operated conveying apparatus. The sides of the chutesshould be of sufficient height above the bottom to retain the oretherein, and the bottom extends from the hopper at an angle to the disks13 to the point corresponding to the position of the pole-pieces 4,.andfrom that point to the other end the chute is substantially parallel tothe disks andin close proximity thereto. i

In order to effect vibration of the chutes to insure proper feeding ofthe material and also to agitato it to such an extent that the magnetwill pick up all the magnetic material therefrom, I provide a shaft 30,'which is supported in suitable standards 31, and on this shaft, whichis, for convenience, held stationary, but which, of course, might be arotating shaft, I mount a sleeve 32, and on this sleeve is fastened aneccentric 32a, the strap 33 of which is connected, by means of a rod 34,to a rockerhead 35, the latter being pivoted to a suitable part of theframework. One arm of the rocker-head is connected by a rod 36 to one ofthe chutes 24, and the other arm is connected by a rod 37 to the otherchute 24, so that as the rocker-head is moved by the eccentric it willcause the chutes to vibrate later ally, and thus agitate and feed thematerial through them.

Mounted upon the sleeve 32 is a pulley 3S, and journaled upon the shaft30 near one side of the frame is a similar pulley 39. An idlerpulley 40is journaled in suitable bearings in an auxiliary frame 41, that ishinged at 42 to one end of the main framework, and the other end of theframe 41 is provided with an adjusting-screw 43 in order that it may beadjusted laterally with reference to the main framework.

The vibrating apparatus and the separator-disks are operated by powerfromany suitable source-as, for instance, from the main shaft of anengine-either directly or indirectly through a line of shafting, (notshown,) by means of the pulleys already described and a belt 44, whichpasses from a pulley on the driving-shaft, (not shown,) beneath thepulley 39 on shaft 30, around the pulley 10 on one of the shafts 9,around the idler-pulley 40, around the other pulley 10, beneath thepulley 3S, and thence to the pulley on the driving-shaft or fromseparate sources of power, the speed ofl either or both of which may bevariable.

It will be seen from this construction that the disks 13 will be rotatedin opposite directions, and if rotated in the directions indicated bythe arrows in Fig. 2 the material as it is conveyed through the chutebeneath the pole-pieces 4 will be separated, the magnets serving to pickup the magnetic particles and hold them to the disks until they arecarried beyond the edges of the chutes and the extremities of thepole-pieces, when they will drop off, the non-magnetic particles beingretained in the chute until they drop ofl' at the end. l

The curvature of the pole-pieces is made such that it does not coincidewith the lines of force, so that as the disk rotates the magnetic fieldserves to tumble the material over and over, and thus remove all dustand other material which might otherwise be carried forward with theconcentrates.

In order to more certainly separate all of the magnetic from thenon-magnetic portions of the material, I may employ substantially theform of pole-piece indicated in Fig. 6, this pole-piece 45 being ofapproximately horseshoe shape, so that the part 46, beneathwhich thematerial is first fed, picks up the magnetic material, and if it doesnot take up all of it the portion 47 will be in position to remove theremainder as the material passes beneath it, the material beingcontinuously agitated, so that the conditions are favorable for theremoval of all of the magnetizable portion.

The pole-pieces obviously need not necessarily be of curved contour, andeven though they be curved the curvature may be different from anythingshown without departing from my invention. It will be further understoodthat the details of construction may be varied otherwise than asspecifically set forth without departing from the invention.

I claim as my invention- 1. In a magnetic separator, the combinationwith a non-magnetic disk and means for rotating it, of an electromagnethaving. a curved segmental pole-piece the face of which is adjacent tothe upper side of said disk and is eccentric thereto, an inclined chutefor the material to be treated extending in proximity to the bottom faceof said disk and means for effecting vibration of said chute to feed thematerial forward and insure presentation of all portions thereof to theaction of the magnetic field.

2. In a magnetic separator, the combination with a non-magnetic disk andmeans for IOO IIO

rotating it, of an electromagnet having a curved pole-piece at one endthe face of which is in proximity to said disk and is ec- .centric withreference thereto, an inclined chute extending beneath and adjacent tothe rotating disk and means for causing the chute to vibrate laterallyin order to feed the material forward and insure presentation of allportions thereof to the action of the magnetic field.

3. In a magnetic separator, the combination with an electromagnet havinglaterallyprojecting pole-pieces, non-magnetic disks rotatably supportedbeneath and adjacent to said pole-pieces and means for rotating saiddisks in opposite directions, of a plurality of chutes extending beneathand in proximity to said disks and means for effecting lateral vibrationof said chutes in order to'feed the material forward and insurepresentation of all portions thereof toethe action of the magneticfield.

4. In a magnetic. separator, .the combination with an electromagnethaving laterallyprojecting pole-pieces and a plurality of non- 'magneticdisks rotatably mounted below and adjacent to said pole-pieces, of aplurality of inclined chutes extending beneath and in proximity to saiddisks and means for effecting vibration of said chutes in order to feedthe material forward and insure presentation of all portions thereof tothe action of the magnetic field..

5. In a magnetic separator, the combination with an electromagnet havinglaterallyprojecting pole-pieces anda plurality of nonmagnetic disksrotatably mounted below and adjacent to said pole-pieces, ofa pluralityof inclined chutes extending beneath and adj acent to said disks, meansfor effecting vibration of said chutes to feed the material forward andinsure presentation of all portions thereof to the action of themagnetic field and means for varying the degree of inclination of saidchutes.

6. In a magnetic separator, the combination with one or more rotatable,non-magnetic disks and means for rotating the same, of an electromagnethaving laterally-proj ecting, curved pole-pieces the faces of which areadjacent to the upper side of said disk or disks and are eccentricthereto, one or more inclined chutes extending beneath and in proximityto said disk or disks and means for effecting vibration of said chute orchutes in order to feed the material forward and insure presentation ofall portions thereof to the action of the magnetic field.

7. In a magnetic separator, the combination with one or morenon-magnetic disks and means for rotating the same, of an electromagnethaving laterally projecting,

curved pole-pieces, the curvature of which is eccentric to that of thedisk or disks, one or more vertically-adjustable chutes extendingbeneath said disk or disks and means for effecting lateral vibration ofthe same in order to feed the material forward and insure presentationof all portions thereof to the action of the magnetic field.

In testimony whereof I have hereunto subscribed my name this 6th day ofAugust, 1902.

CHARLES J. REED.

Witnesses:

JAMES W. LAWS, RoB'r. B. FLETCHER.

